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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2011 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: EnumUtil.html 947 2014-11-12 22:14:09Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.dellroad.stuff.java;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import java.util.Arrays;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import java.util.Collections;<a name="line.11"></a>
<span class="sourceLineNo">012</span>import java.util.List;<a name="line.12"></a>
<span class="sourceLineNo">013</span><a name="line.13"></a>
<span class="sourceLineNo">014</span>/**<a name="line.14"></a>
<span class="sourceLineNo">015</span> * Utility methods for {@link Enum}s.<a name="line.15"></a>
<span class="sourceLineNo">016</span> */<a name="line.16"></a>
<span class="sourceLineNo">017</span>public final class EnumUtil {<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>    private EnumUtil() {<a name="line.19"></a>
<span class="sourceLineNo">020</span>    }<a name="line.20"></a>
<span class="sourceLineNo">021</span><a name="line.21"></a>
<span class="sourceLineNo">022</span>    /**<a name="line.22"></a>
<span class="sourceLineNo">023</span>     * Get all instances of the given {@link Enum} class in a list in their natural ordering.<a name="line.23"></a>
<span class="sourceLineNo">024</span>     *<a name="line.24"></a>
<span class="sourceLineNo">025</span>     * @return unmodifiable list of enum values<a name="line.25"></a>
<span class="sourceLineNo">026</span>     */<a name="line.26"></a>
<span class="sourceLineNo">027</span>    @SuppressWarnings("unchecked")<a name="line.27"></a>
<span class="sourceLineNo">028</span>    public static &lt;T extends Enum&lt;?&gt;&gt; List&lt;T&gt; getValues(Class&lt;T&gt; enumClass) {<a name="line.28"></a>
<span class="sourceLineNo">029</span><a name="line.29"></a>
<span class="sourceLineNo">030</span>        // Generate ClassCastException if type is not an enum type<a name="line.30"></a>
<span class="sourceLineNo">031</span>        enumClass.asSubclass(Enum.class);<a name="line.31"></a>
<span class="sourceLineNo">032</span><a name="line.32"></a>
<span class="sourceLineNo">033</span>        // Get values<a name="line.33"></a>
<span class="sourceLineNo">034</span>        Object array;<a name="line.34"></a>
<span class="sourceLineNo">035</span>        try {<a name="line.35"></a>
<span class="sourceLineNo">036</span>            array = enumClass.getMethod("values").invoke(null);<a name="line.36"></a>
<span class="sourceLineNo">037</span>        } catch (Exception e) {<a name="line.37"></a>
<span class="sourceLineNo">038</span>            throw new RuntimeException("unexpected exception", e);<a name="line.38"></a>
<span class="sourceLineNo">039</span>        }<a name="line.39"></a>
<span class="sourceLineNo">040</span>        return Collections.unmodifiableList(Arrays.asList((T[])array));<a name="line.40"></a>
<span class="sourceLineNo">041</span>    }<a name="line.41"></a>
<span class="sourceLineNo">042</span>}<a name="line.42"></a>
<span class="sourceLineNo">043</span><a name="line.43"></a>




























































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